﻿<!DOCTYPE html>
<html>
<head>
  <title>Balloon Link</title>
  <!-- Copyright 1998-2020 by Northwoods Software Corporation. -->
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <meta name="description" content="TypeScript: A demonstration of the BalloonLink extension for implementing word balloons or speech bubbles as comments in diagrams about particular objects." />
  <script src="../assets/js/goSamples.js"></script> <!-- this is only for the GoJS Samples framework -->
</head>
<body>
  <div id="sample">
    <div id="myDiagramDiv" style="border: solid 1px black; width:300px; height:300px"></div>
    <p>
      A <b>BalloonLink</b> is a custom <a>Link</a> that draws a "balloon" shape around the Link.fromNode. It will create
      a triangular shape with the base at the fromNode and the other point at the toNode. It is defined in its own file,
      as <a href="BalloonLink.ts">BalloonLink.ts</a>.
    </p>
    <p>
      Usage can also be seen in the <a href="../samples/comments.html">Comments</a> sample.
    </p>
  </div>

  <script type="module" id="code">
    import * as go from "../release/go-module.js";
    import { BalloonLink } from "./BalloonLink.js";

    if (window.goSamples) goSamples(); // init for the samples -- you don't need to call this
    const $ = go.GraphObject.make;  // for conciseness in defining templates

    const myDiagram =
      $(go.Diagram, 'myDiagramDiv',  // create a Diagram for the DIV HTML element
        {
          'undoManager.isEnabled': true  // enable undo & redo
        });

    // define a simple Node template
    myDiagram.nodeTemplate =
      $(go.Node, 'Auto',  // the Shape will go around the TextBlock
        $(go.Shape, 'Rectangle', { strokeWidth: 0 },
          // Shape.fill is bound to Node.data.color
          new go.Binding('fill', 'color')),
        $(go.TextBlock,
          { margin: 8 },  // some room around the text
          // TextBlock.text is bound to Node.data.key
          new go.Binding('text', 'key'))
      );

    myDiagram.linkTemplate =
      $(BalloonLink,
        $(go.Shape,
          { stroke: 'limegreen', strokeWidth: 3, fill: 'limegreen' })
      );

    // create the model data that will be represented by Nodes and Links
    myDiagram.model = new go.GraphLinksModel(
      [
        { key: 'Alpha', color: 'lightblue' },
        { key: 'Beta', color: 'orange' }
      ],
      [
        { from: 'Alpha', to: 'Beta' }
      ]);

    window.myDiagram = myDiagram; // Attach to the window for console debugging
  </script>
</body>
</html>